<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

    <el-card>
        <el-alert
            title="添加商品信息"
            type="info" :closable="false" center>
        </el-alert>
        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- 添加商品的表单 -->
        <el-form :model="addGoodsForm" :rules="addGoodsRules" ref="addGoodsRefs" label-width="100px" label-position='top'>
            <!-- 左侧tab页 -->
            <el-tabs tab-position="left"  v-model="activeIndex" :before-leave="beforeTabsLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                    <el-input v-model="addGoodsForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                    <el-input v-model="addGoodsForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight" type="number">
                    <el-input v-model="addGoodsForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                    <el-input v-model="addGoodsForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <!-- 级联选择框 -->
                        <el-cascader
                        v-model="addGoodsForm.goods_cat"
                        :options="cateList"
                        :props="cateProps"
                        @change="handleChange">
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                  <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <!-- 复选框组件 -->
                      <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key='i' border></el-checkbox>
                      </el-checkbox-group>
                  </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name"  v-for="item in onlyTableData" type="number" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                  <!-- 图片上传 -->
                  <!-- action表示图片上传的地址 -->
                  <el-upload
                  :action="actionUrl"
                  :on-preview="handlePreview"
                  :on-remove="handleRemove"
                  list-type="picture"
                  :headers="headersObj"
                  :on-success="handleSuccess">
                  <el-button size="small" type="primary">点击上传</el-button>
                </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                  <!-- 富文本编辑器 -->
                  <quill-editor v-model="addGoodsForm.goods_introduce"></quill-editor>
                  <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
        <el-dialog
          title="图片预览"
          :visible.sync="previewVisible"
          width="50%">
          <img :src="previewPath" alt="" class="preview-class">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
  data () {
    return {
    // 步骤的索引
      activeIndex: 0,
      addGoodsForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        // 图片的路径列表
        pics: [],
        // 商品详情
        goods_introduce: '',
        attrs: []
      },
      addGoodsRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请输入商品分类', trigger: 'blur' }]
      },
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover'
      },
      manyTableData: [],
      onlyTableData: [],
      // 图片上传的路径
      actionUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 添加上传图片需要的请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览路径
      previewPath: '',
      // 图片预览对话框可见
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      //   console.log(res.data)
      // 给数据列表赋值
      this.cateList = res.data
    },
    handleChange () {
    //   console.log(this.addGoodsForm.goods_cat)
    //   console.log(this.addGoodsForm.goods_cat)
      if (this.addGoodsForm.goods_cat.length !== 3) {
        this.addGoodsForm.goods_cat = []
        return this.$message.error('请选择三级分类')
      }
    },
    // tab切换之前调用
    beforeTabsLeave (activeName, oldActiveName) {
    //   console.log(activeName)
    //   console.log(oldActiveName)
      if (oldActiveName === '0' && this.addGoodsForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    // tab点击事件
    async tabClicked () {
      // console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error('获取参数数据失败')
        // console.log(res.data)
        //   把数据的attr_vals字符串变为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
          // 添加一个控制添加tag 按钮 与文本框的切换
          item.inputVisible = false
          // 文本框输入的值
          item.inputValue = ''
        })
        // 判断tab页的类型。然后赋值给对应的列表
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error('获取参数数据失败')
        console.log(res.data)
        //   把数据的attr_vals字符串变为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
          // 添加一个控制添加tag 按钮 与文本框的切换
          item.inputVisible = false
          // 文本框输入的值
          item.inputValue = ''
        })
        // 判断tab页的类型。然后赋值给对应的列表
        this.onlyTableData = res.data
      }
    },
    // 图片预览处理函数
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 图片上传成功处理事件
    handleSuccess (response) {
      // console.log(response.data.tmp_path)
      // 先拼接一个对象
      const picInfo = {
        pic: response.data.tmp_path
      }
      // 然后把对象push进数组中
      this.addGoodsForm.pics.push(picInfo)
    },
    // 图片删除后处理事件
    handleRemove (file) {
      // console.log(file)
      // 获取要删除图片的临时路径
      const filePath = file.response.tmp_path
      // 从pics数组中找到对应的索引值
      const i = this.addGoodsForm.pics.findIndex(x => x.pic === filePath)
      // 调用数组的splice方法将其删除
      this.addGoodsForm.pics.splice(i, 1)
    },
    // 添加商品
    addGoods () {
      // 表单预验证
      this.$refs.addGoodsRefs.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项')
        // 因为级联选择器双向绑定了goods_cat是数组，而提交表单时必须是个字符串，所以要做一下lodash.深拷贝，拷贝出一个新的表单
        const form = _.cloneDeep(this.addGoodsForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addGoodsForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addGoodsForm.attrs.push(newInfo)
        })
        form.attrs = this.addGoodsForm.attrs
        // 发起请求添加商品
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    // 计算传入的分类id
    cateId () {
      if (this.addGoodsForm.goods_cat.length === 3) {
        return this.addGoodsForm.goods_cat[2]
      } else {
        return null
      }
    }
  }
}
</script>
<style lang="less" scoped>
.preview-class{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}

</style>
